Compensated alternating-current commutator motor with reversible direction of rotation



Sept. 1, 1925. 1,552,360

H. TRAUERNICHT COIPENSATED ALTERNATING CURRENT-COMMUTATOR mo'ron wn'nREVERSIBLE DIRECTION OF ROTATION Filed Oct. 6, 1924 IW/nwes: J/wemor:vat-.44" ML.

Fatentcd Sept. 1, 1925.

UNITED STATES PATENT OFFICE.

HANS TRAUERNIO'HT, OF KIEL-GAARDEN, GERMANY.

COMPENSATED ALTERNATING-CURRENT COMMUTATOR MOTOR WITH REVERSIBLEDIRECTION OF ROTATION.

Application filed October 6, 1924. Serial No. 742,030.

To aZZ whom it may canoe m:

Be it known that I, IIANs TRAUERNICHT, a citizen of the German Republic,residing at Kiel-Gaarden, Germany, have invented certain new and usefulImprovements in Compensated Alternating-Current Commutator Motors withReversible Direction of Rotation, of which the following is aspecification.

In compensated alternating-current commutator motors for singleorthree-phase current, which have different brush positions for rotationto the right or to the left, a clear and definite indication of thecorrect position of the brush rocker is necessary.

For this purpose the brush rocker is pro vided with two blade likeextensions bearing signs indicating the direction of the rotation of themotor, which are arranged at a distance from each other corresponding tothe angle of brush displacement, while the stationary part of the motorpossesses a window, behind which the signs of the brush rocker becomevisible only when th brush rocker is in the correct position either forthe rotation to the right or for the rotation to the left. In all otherpositions of the brush rocker the signs remain invisible.

In the accompanying drawing an alter mating-current commutator motor,provided With such an indicating device is represented:

Fig. 1 shows the motor in front elevation, and

Fig. 2 in side elevation, partially in section.

A portion of the casing of the motor is apertured at a on the side wherethe brush rocker b is arranged, while the latter carries two blade-likeextensions 0, upon which 1. In compensated alternating currentcommutator motors with reversible direction of rotation, the combinationwith the shiftable brush rocker of two blade-like extensions displacedapart a distance equal to the brush displacement and bearing directlonsigns, and means on the motor casing wherewith one or other of saidextensions is adapted to register when the brush rocker is in positionfor correct running in the direction indicated by said registeringextenslon.

2. In compensated alternating-current commutator motors with reversibledirection of rotation, the combination of a shiftable brush-rocker, twoblade-like extensions on said rocker, each of them carrying a signindicating the direction of rotation in opposite senses, and anapertured portion in the casing enclosing the brush rocker behind whichupon shifting the said rocker into the correct position that extensionof the brush rocker is visible which bears the sign indicating thedesired direction of rotation.

In testimony whereof I have hereunto affixed my signature.

HANS TRAUERNICHT.

